Terminal for pneumatic-despatch tubes.



G. S. JENNINGS.

TERMINAL FOR PNEUMATIC DESPATOH TUBES.

APPLICATION FILED APR. 18. 1906.

968,566. Patented Aug. 30, 1910.

2 SHEETSSHEET 1.

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G. 8. JENNINGS.

TERMINAL FOR PNBUMATIU DESPATGH TUBES.

APPLICATION FILED APR.18, 1906.

Patented Aug. 30, 1910.

2 SHEETS-SHEET 2.

nNrnin STATES P TENT ormon.

CHESTER S. JENNINGS, OE BROOKLINE, MASSACHUSETTS, ASSIGNOR TO LAMSON CON- SOLIDATED STORE SERVICE COMPANY, OF NEWARK, NEW JERSEY, A CORPORA- TION OF NEW JERSEY.

TERMINAL FOR PNEUMATIC-DESPATCH TUBES.

Specification of Letters Patent.

Patented Aug. 30, 1910.

To all whom it may concern:

Be it known that I, CHESTER S. JENNINGS, of Brookline, in the county of Norfolk and State of Massachusetts, have invented certain new and useful Improvements in Terminals for Pneumatic-Despatch Tubes, of which the following is a specification.

My invention relates to improvements in power control for pneumatic despatch tube apparatus, and its object is to automatically start the power into operation upon the insertion of a carrier into the system, and upon the discharge of said carrier at its destination, to automatically shut off the power.

In the accompanying drawings which illustrate a construction embodying my invention, Figure 1 is a side elevation in sec tion of a terminal showing the device in normal position and in connection with the source of power. Fig. 2 is an enlarged sectional view of the upper portion of the terminal showing a carrier inserted for transmission and the inlet door closed. Fig. 3 is a sectional view of the upper portion of the terminal showing the carrier about to discharge and operating the mechanism for automatically shutting off the power. Fig. 4 is an enlarged detail view of part of Fig. 3 showing part of the switch-controlling mechanism.

Like letters of reference refer to like parts throughout the several views.

The cabinet A (Fig. 1) contains the motor B carrying the worm C; the worm gear D meshes with and is driven by the worm C, said gear D being rigidly mounted on the shaft D which is supported by suitable bearings D The crank E rigidly mounted on the shaft D is connected with the free end of the slotted lever G by the link F, the opposite end of said lever G being pivoted to the support G. The lower or movable part of the bellows H is mounted and adapted to operate within the slot I. The pressure tube J mounted in the upper part of the cabinet A is connected with the upper part of the bellows H, said bellows being stationarily fixed at H. A check valve K is arranged to control the connection of tube J with bellows H. The transmission tube M is connected with the pressure tube J by the casing J, communication being made by means of the chamber Q and the openings Q. The sliding door N controls the mouth of the transmission tube M andis normally held open by the spiral spring P attached to the stud R. v

The diaphragm S is mounted in the easing J, its outer face being open to the atmosphere, the tension upon said diaphragm being adjusted by the spring S and thumb screw S mounted in the extension S of said casing J. The check nut S holds the thumb screw S in position. The latch S is pivoted to the tube M at S and connected with the diaphragm S by the link S. The valve V is pivoted to the tube M at V and is normally held in position to allow the passage of carrier through the tube M by means of the spring V. Said valve V is opened by means of the trip V pivoted at V one end of which trip projects into the tube Mthe other end being adapted to reciprocate the rod V. The upper end of the rod V operates an extension V of the valve V The knife switch T is normally held away from the contacts T by the spring T at its lower end and insulated therefrom. The upper end of said switch T is pivoted at T to the casing J and insulated there from. The circuit Z and Z of the motor B is controlled by the switch T which connects with line wires Z The terminal at the other end of the system is identical with thatshown in Fig. 1. The directions of the air circuits are shown by arrows.

The operation is as follows: The sliding door N being normally open, the operator inserts a carrier X into the transmission tube M and then closes the said door by means of the handle 0 (Fig. 2). Upon the closing of said door N the stud R engages the lower insulated portion of the knife switch T thereby throwing it into connection with the contacts T The latch S now engages the rear end of the door N holding it in closed position by the tension of the diaphragm S The circuit now being completed with the motor B through the wires Z and Z, said motor is thrown into operation and through the medium of the worm C, worm gear D, link F and lever G, the cran E actuates the bellows H. The pressure being transmitted through the check valve K, tube T, chamber Q and openings Q to the transmission tube M, transmits the carrier through said tube M to its destination, see Fig. 3. The carrier X now strikes the trip V closing the valve V by means of the rod V thereby causing a back pressure through the transmission tube M and into the chamber Q of the terminal from which the carrier was despatched, which acting upon the diaphragm S lifts the latch S releasing the sliding door 1T which is opened by the spring P. The carrier in the meantime has discharged from the tube M into a suitable receptacle M. Upon the opening of the door N, the switch T is released from the pressure of the stud R and said. switch is thrown away from contacts T thereby breaking the circuit and throwing out of operation the motor B. The valve V is now thrown back into normal position shown in Fig. 1 by means of the spring V Having thus described the nature of my invention and set forth a construction embodying the same, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a pneumatic despatch tube apparatus, a tube for the transmission of carriers, a door controlling the mouth of said tube and normally open, apump adapted to supply pressure to said apparatus, a motor for driving said pump, means for automatically starting said motor in operation upon the closing of said door, pneumatically-controlled means for holding said door closed, and means adapted to be operated upon the arrival of a carrier at the delivery end of said tube to close said tube to the further passage of air whereby the accumulation of air pressure will actuate said pneumatically cont-rolled means to open said door and stop said motor.

2. In a pneumatic despatch tube apparatus, a tube for the transmission of carriers, a door controlling the mouth of said tube and normally open, a pump adapted to supply pressure to said apparatus, a motor for driving said pump, means for automatically starting said motor in opera tion upon the closing of said door, a pneumatically controlled latch for locking said door in closed position, a valve adapted to be closed by a carrier upon its arrivel at the opposite end of said tube to create a back pressure and operate said latch whereby said door and switch are opened and said motor is thrown out of operation.

3. In a pneumatic despatch tube apparatus, a tube for the transmission of carriers, a door controlling the mouth of said tube and normally open, a pump adapted to supply pressure to said apparatus, a motor for driving said pump, means for automatically starting said motor in operation upon the closing of said door, means for locking said door in closed position, and means operative upon the arrival of a car rier at the opposite end of said tube to close said tube to the further passage of air whereby the accumulation of air acts to release said locking means whereby said door is opened and said motor is thrown out of operation.

4-. In a pneumatic despatch tube apparatus, a tube for the transmission of carriers, a door cont-rolling the month of said tube and normally open, a pump adapted to supply pressure to said apparatus, a motor for driving said pump, a switch con trolling said motor and normally open mechanism adapted upon the closing of said door to automatically close said switch thereby throwing into operation said motor, a pneumatically-controlled latch adapted to lock said door closed, a valve adapted to be closed by a carrier upon its arrival at the opposite end of said tube to create a back pressure and operate said latch whereby said door and switch are opened and said motor thrown out of operation, and means for returning said valve to normal posi tion after said motor has stopped.

5. In a pneumatic despatch tube apparatus, a tube for the transmission of carriers, a door controlling the mouth of said tube and normally open, a pump adapted to supply pressure to said apparatus, a motor for driving said pump, a switch controlling said motor and normally open, mechanism adapted upon the closing of said door to automatically close said switch thereby throwing into operation said motor, a latch adapted to engage and hold said door closed, and means adapted to be operated upon the arrival. of the carrier at the delivery end of said tube to close said tube to the further passage of air whereby the accumulation of air pressure will operate said latch to release said door and open said switch thereby stopping said motor.

6. In a pneumatic despatch tube apparatus, a tube for the transmission of carriers, a door controlling the mouth of said tube and normally open, a pump adapted to supply pressure to said apparatus, a motor for driving said pump, a switch controlling said motor and normally open, mechanism adapted upon the closing of said door to automatically close said switch thereby throwing into operation said motor, a latch adapted to engage and hold said door closed, a diaphragm connected with said latch, means adapted to be operated upon the arrival of the carrier at the delivery end of the tube to close said tube to the further passage of air whereby the accumulation of air pressure Will actuate said diaphragm to open said door and said switch and stop said motor.

7. In a pneumatic despatch tube apparatus, a tube for the transmission of carriers, a door controlling the mouth of said tube and normally open, a pump adapted to supply pressure to said apparatus, a motor seams a In testimony whereof, I have signed my 10 name to this specification in the presence of ism for locking said door, and means adapttwo subscribing Witnesses, this 16th day of ed to be opcelrated upor thfe argiva of a lzar- I April A. D. 1906. rier at the elivery en 0 sai tu e to c ose said tube to the further passage of air i CHESTER JENNINGS whereby the accumulation of air pressure Witnesses: will act to release said locking mechanism E. ZEMMIN, and permit the opening of said door. 1 K. B. HUNT.

for driving said pump, mechanism for starting and stopping said motor, mechan- 

